code: def gam_train_metrics_recalculate_poisson():
      gam_train_metrics_recalculate("poisson", [0])
  
file_path: h2o-3/h2o-py/tests/testdir_algos/gam/pyunit_gam_train_metrics.py
imports: import sys
  import h2o
  from h2o.estimators.gam import H2OGeneralizedAdditiveEstimator
  import pandas
  import numpy
  from tests import pyunit_utils
label_desc: Use image node_id 2 for calling a global function with example usage: gam_train_metrics_recalculate_poisson() without return types